Clay pavers classification
In accordance with The South African National Standard (SANS 1575:2007) for burnt clay paving units.
PA
Units that are selected or produced for their durability and for a high degree of uniformity in size and shape, and that have dimensions such that the ratio of work size length to work size width is approximately 1:1; 2:1 or 3:1.
Tolerances in work sizes - Length, Width, Thickness
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Individual Unit - 5mm, 3mm, 3mm
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Average Dimensions of 32 units (mm) - 2.5mm, 1.5mm, 1.2mm
Average modulus of rupture
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NOTE - The following requirement does not apply to paving units of length less than 80 mm.
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Nominal modulus of rupture - 4MPa
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Minimum individual modulus of rupture - 2.5MPa
PB
Units that are selected or produced for their durability and for their uniformity in size and shape.
Tolerances in work sizes - Length, Width, Thickness
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Individual Unit - 6mm, 4mm, 4mm
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Average Dimensions of 32 units - 3mm, 2mm, 2mm
Average modulus of rupture
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NOTE - The following requirement does not apply to paving units of length less than 80 mm.
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Nominal modulus of rupture - 3MPa
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Minimum individual modulus of rupture - 2MPa
